It is true that there are still abundant reserves of metals which have not yet b

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问题 It is true that there are still abundant reserves of metals which have not yet been______, but it is necessary to take steps to ensure that alternative materials are substituted whenever possible.

选项 A、utilized
B、mobilized
C、acquired
D、cultivated

答案 A

解析 utilize表示“利用”的意思:mobilize意为“动员”,如:Our county’s in great danger;we must mobilize the whole nation.我们正处于严重的危险之中,我们必须把全国人民动员起来。acquire 意为“获得”,如:She acquired knowledge of the English by careful study.她认真学习而精通英语。但acquire knowledge (education),不说acquire reserve
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